Pump



M. B. EsLlNGER.

PUMP.

APPUCATION FILED DEC.13, 1920. 1,412,279. Patented Apr. 11, 1922.

,tube or other. suitable device.

UNITED STATES PATENT OFFICE.

MELVIN B. ESLINGER, ST. LOUIS, MISSOURI, ASSIGNOR TO TORNADO AUTO PUMP COMPANY, OF' ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

PUMP.

specification of Letters Patent.

rammed Apr. 11, 1922.

Application filedvIJecember 13, 1920. 'Serial No. 430,239.

To all w71 om it may concern:

Be it known that I, MELVIN B. EsLiNGER, a citizen of the United States, residing at the city of St.-Louis, in the State of Missouri, have invented certain new and useful linprovemeiits in Pumps, of which the following is a specification.

This invention is a pump and is especially adapted for inflating pneumatic tires for vmotor-vehicles and the like. Its especial advantages are collapsibility (enabling it to tit in an ordinary .automobile tool-box or other` small space) and the more rapid introduction of air into the tube or the like to be inflated. It can be used for inlating footballs, and for-that purpose is especially convenient, because of the small space that it occupies during transportation. It may be used, also, for quick inflation of air-mattresses, air-seats or cushions, bicycle tires, and other useful purposes.

In the accompanying Ydrawings forming part of this specification, in which like numbers of reference denote like parts whereever they occur,

Figure l isJa front elevation;

Figure 2 is a vertical sectional view;

Figure 3 `is a vertical sectional view through the. valve (being on an enlarged scale compared to Figure 2) and Figure 4 is an enlarged detail in section of the plunger. y

The base 1 is a casting having a collar 2 internally threaded at 3,. to co-operate with threads 4 on the lower end of .cylinder 5, which is telescoped by cylinder 6, which, in turn, is telescoped by cylinder 7. A passage 8 leads out of base 1 through nipple 9, externally screw-threaded Vfor attachment to a Passage 8 leads internally to the chamber 10 in base 1, which chamber immediately underlies the hollow interior of cylinders 5, 6, and 7. Chamber 10 consists of a .recess formed in the casting constituting base 1.

To the lugs 11 extending from and preferablycast integral with base l are pivoted the wings.` 12 by pins 13 or other suitable means. The user of the pump will stand on the wings 12 while using the pump, in order to holdit steady and against the `upward pull on handle 14.

The handle 14, wings 12, cylinders 5, 6 and 7, and other parts may be of any suitable size.,` and this pump may be manufactured in various sizes.

A grooved collar 15 is sweated or screwed on the lower end of cylinder 6 and another on the lower end of cylinder 7, and 'packing 16 is contained in the said groove. The upper end of cylinder 5 and the upper end of cylinder 6 are externally threaded to co-operate with the internal threads 17 in collars 18, adapted to screw down to and abut against the collars 15 and to rest there- `on and upon the top edge of the next lower cylinder, which edge fits tightly into the annular crevice between the depending flange of collar`18 and the packing 16 and collar 15, the said combination of parts thus forining a very, tight joint. To prevent the telescoping cylinders becoming aii'bouiid while moving outwardly, a tiny perforation 19` is bored Vthrough or formed in each collar 18.

To tube 20, which is threaded at both ends, is attached handle 14 by nuts 21 or other .suitable means, the said nuts vbeing countersunk in the said handle 14.A

Cap 22 is internally threaded atV 23 and `screws upon lthreads at the upper end of cylinder 7 f Plunger 24 is fixed to ktube 20, and is coinposed of two plates 25 andv .leather packing 26 between the said plates.l This makes a particularly tight piston. Upper plate 25 is provided with a boss or bumper 27.

i valve consisting in part of cylinder 28, .internally threaded near its top, so as to screw upon the lower end of tube 20, carries .plunger 29, which is hollow or tubular except at thevalve proper 30, which seats on valve-seat 31, formed in the shoulder 32 inside cylinder 28. Aspring 33 surrounding plunger 29 normally keeps valve 30 seated on .valve-seat 31, the vsaid spring abutting against shoulder 32 and collar 34, held on .plunger- 29 by Cotter 35 or some similar device.-

When plunger 24 is being moved downward in cylinder 7. valve 30 remains tightly seated on seat 31; but on the upward stroke the air enters through port 36 and overcomes spring33 and passes through openings 37 out past valve 30 into cylinder 7 and thence into cylinders 6 Vand 5 and through chamber 10 and out through exit-port 8.

The downstroke is compound, and consists, first, of the ordinary piston stroke of plunger 24`by force applied to handle 14. About the time when the plunger 24 Yhas reached the limit of its travel, lower ',nut 21 (practically speaking, handle 14) ,presses on cap 22, and continued application of force to handle 14 causes cylinder 7 to enter cylinder 6, which it telescopes, and further force causes cylinder 6 to telescope cylinder '5, with the result that the air in the three cylinders (amounting tto Imuch .greater `volume than if there were but one cylinder, as in ordinary pumps) ismuch compressed and forced under unusual pressure through chamber 10 .and exit-port oripassageS. The three cylinders are plentifully supplied iwith `air on vthe upstrokebecauseIofthe freeness of the intake Athrough Aport |`36. The fact thjatthe air in a plurality of cylinders is .compressed by one plunger and fthe telescoping of all `the cylinders into one cyl inder (three volumes being lthus required to occupy the space of only one) results in more forcible compression of "the air and greater rapidityin inlating altire or other object to be'filled with air.

VAfter use, the pump is collapsech'bycausing the cylinders to telescope, and the wings '12 are folded againstfcylinder 5,'*thus reducing the whole to the minimum size, so

that it will occupy'the least possible space.

The top edge of cylinder 28 closely engages tlie lower surface of lower Vplate 25 of plunger 24. Y

There lbeing a threaded Vconnection between each collar 18 and fonly one of 'the adjacent cylinders, that part within each collai` 18 next tothe other adjacent cylinder being smooth, it follows that the cylinder against which the-said smooth partfbears is free to slide and, also, to turn.

The handle 14 may, also, be inade collapsible or foldable, although this is not shown in the drawings.

Having thus described this invention, .I hereby reserve the benefit of all changes Vin form, arrangement, order, or use of parts, as itV is evident that many minor changes may be made therein without departing from the `spirit of this invention or the scope of the following claims.

I claim:

1. A pump comprising a base, arplura'lity of cylinders suitably connected together and adapted to collapse the pump by assuming telescopic relation to each other, suitable inlet and outlet ports, a valve,` and a plunger., the ysaid connection between 'the said cylinders consisting in a grooved collar having packing within 'the said groove.

2. AA-pump comprising a base, a plurality ofcy'linders suitably connected together and adapted to collapse `thepump vby assuming Laia-279 telescopic relation to each other, suitable in- Vlet and outlet ports, a valve, a plunger, and a plunger-rod, the said rod. being hollow and the said inlet being through the'said hollow plungerei'od, and t-he said valve being -mounted on the inner `end of the said plunger-rod.

3. Apump comprising a base, a Vplurality of cylinders suitably connected together and adapted to collapse ithe pump by assuming telescopic relation to each other, suitable inlet and outlet ports, a valve, a plunger, and

-a plunger-rod, the said rod being hollow 'telescopic relation 'to each other, suitable inletand outlet ports, a valve, a plunger, a plungenrod, the said rod 'being hollow and the said inlet being through the said hollow *plunger-rod, Aand =the said valve being mounted on the 'inner end of the said plunger-rod, the said 4valve having a hollow interior that communicates with the said hollow plunger-rod, and an exit from the said hollow interior.

5. A pump comprisinga base, a plurality of cylinders suitably connected together and adapted to collapse the pump by assuming i telescopic relation` to each fothe'r, suitable inlet and outlet ports, a valve, a plunger, a plunger-rod, the said rod being hollow ,and

,the said inlet beingthroughthc said hollow plunger-rod,

and the said valve being mounted on the Ainner end of the said plunger-rod, 4the said valve having a hollow interior that communicates with the said hol*- 2low plunger-rod, an exit from the said hollow interior, and a Avalve-proper adapted to iclose on the downstrolre and open on the upstroke. Y

6. A pump including telescoping cylinders, aV handle carrying ,a .plunger rod mounted iin one of the cylinders, a piston `mounted Aon the rod, and avalve chamber detachably carriedby said 4rod and pending below the piston, pressure on .the handle of Vsaid plungerprimarily operating the is- 'ton, continued pressure on Vthe handle Icjollapsing said cylinder to force the air therefrom, said handle being hollow to permit influx vof air therethrough Vfor vopening the valve on `the rip-stroke yof thepiston.

In testimony whereof I hereunto aflix my signature. l

/ MEIJVI'N B. 'E SLINGER. 

